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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 6840

I. Moreno-Garrido, L.M. Lubian, and A.M.V.M. Soares; In Vitro Populations of Rotifer Brachionus plicatilis Muller Demonstrate Inhibition When Fed with Copper-Preaccumulating Microalgae. Ecotoxicol. & Environ.Safety 44:220-225, 1999

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Four marine microalgal species (Chlorella autotrophyca, Nannochloropsis gaditana, Tetraiselmis chuii, and Isochrysis aff. galbana) were exposed for 24 hr to 1 mg L-1 dissolved copper and then transferred to fresh medium. After that, a group of 10 neonate rotifers were fed with these four microalgal species. The levels of accumulated copper in cellular concentrations of the microalgae were checked, with the result of around 40% of original concentration, with the exception of I. aff. galbana (25% of original concentration). In all cases, cells with preaccumulated metal caused a delay of 1 or 2 days in populational development of rotifers (increase in "lag phase"). The microalgae that were not fed to rotifers (disposed in parallel series) did not significantly transfer metal to the medium after the first day.